Well-strainer.



IVI. B. VAN NESS.

WELL STRAINER.

APPLICATION FILED JUNE I7, 19I8.

Patented Jan. 14, 1919.

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` WELL STRAINER. APPLICATION FILED JUNE 11, 191s.

meme@ Jam., ML, 19119.

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To all lwhom it 'may concern:

.Be it own that l, VIN

a pitizenoi? the United States, at present residing in Welsh, in the parish oi Je'erson t llavis and State et Louisiana, have invented a new and lmproved ell- Strainer., ot

which the following is a specication.

h/ly invention is an improved strainer especially adapted for use in deep wells and it l@ particularly has for itsl object to provide `a strainer which will be inexpensive, one .which can readily be put into place and one in which provision is made tor the'settling ot the hltering material. The invention also has tor its object to provide a strainer which can be assembled and pachedbeiore setting in the well and one whose construction is' such that water may be forced down on the inside and outau wardly through the strainer, thereby washing the mud out oi the hole, alter the strainer has been installed.

lilly invention .furthermore provides lor a strainer ol' any length desired, since by using ab a number of ipe sections, the length oi the iilter may e adapted tothe particular .well in which it is to be use Again, the .invention has tor its object to provide an open bottom strainer, whereby tu the samenmay be set in wells at great depth by utilizing the Yj etting process and alter being set the lopening at the bottom can be plugged up. s

Fheinvention includes those novel details tu olconstruction, combination and arranger ment ot parts, all oil which will be rst fully described and then specihcally pointed out in the appended claims, reference being had to the accompanying drawings in which:

Fie l is a vertical longitudinal section, parts being broken away illustrating the invention in use in a deep irrigation'well.

' Fig. E is an enlarged detail vertical section, parts being broken away, o'l the at strainer per ae.. y y Fi s.. B and l are respectively ctions on the hnes3-3 and l-fl ol Fig. 2.,

Fi. a view simf'lar to mod cation ol the invention showing the un open bottom strainer before the bottom hole has been plugged up. 4

Figs.. t and l arev respectively cross secp tions on the lines 6 6 and' ill-'l' oi Fig. 5.

Fig. 8 is a detail vertical sectional view ttt ol the lower end ot a modied torni ol e' B. Fan bluse,

to permit passage of the water and around bottom by a losure plug 6, suitably securedv to the two pipes in relatively aed relation:

strainer showing how water may be pumped down through the strainer and outwardly to wash mud out of the well hole and to clean the hltering material.

ln the drawings in which like numerals of v60 'reference indicate like parts in all gures, l

" is the pitcasing and 2 the well casing which,

at its lower end, constitutes a part oi' the strainer .which forms the subject matter of `nay present application.'

'lhe strainer consistsv of the inner pipe 2 built up oi sections, it desired, coupled together as at 3.:

lhe pipe 2 is slotted or perforated as at 4: l

lill

vti 5 the pipe 2 and spaced a suitable distance from the same is another pipe 5 which is also provided with periorations l0, the pipes 2 and 5 bein spaced apart to form a chamber to contain the liltering material which ma be gravel Vor other suitable material, suc forl example as adamantine, the latter being preferred, where high pressures are encountered, as in gas we'l1s,'etc.

'.lhe strainer ,may consist only oi the two to `pipe sections 2 and-5 with the ltering materia'l 9 located between the pipes (see Fig Q) or additional pipes 1l may be provided and additional ltering material 9, as indicated in Fig. 5y, the several pipes being suitably perliorated and spaced from one ranother as best indicated in Figs'. 3, l, 6 and 7 oi the drawings.,

y Ilhe pipes 2 and 5 are spaced apart at the and spacers 7 may be located between the pipes near the upper end or at intervals, it desired, to maintain the pipes in concentricA relatie b5 The pipes 2 and 5 (andthe additional v l pipes surrounding the same, when such are employed) are erforated only a certain distance trom therr'lower end, say to the line 'a-a in Figs. 2 and 5 and above this line, flor a desired distance, the pipes are imi perforated so as to provide a reservoir or opper lor the' hltering material, the object ol which is to provide a reserve supply ot hltering materialthat will settle down and talre the place of the ltering material within the perforated zone ol the' pipes fas such material becomes worn by the abrasive action oil the water or as such material set-l l tles do into more eompact 'ioatio'm ,llo

after'it has been put into lace thus insuring long life to the filter before' vided for it and the bottom of the pipe 2 may bevplug ed up, if desired, or it ma be left o en and water pumped down throilgh the pipe 2 through the open bottom to wash out the well during the lowering of the ilter into the saine, or if preferred, a structure such as shown in Fig. 8 may be employed, in which the bottom of thepipe 2 is closed by a perforated wall 8 and the bottom of the outer pipe 5 is also provided with a perforated wall 13 between which the ltering material is located and water can be pumped down through the pipe 2 to force 1t out through the perforations and filtering11 material to wash the mud out of the we the strainer is loweredl into the Well, without the pipe 2 being plugged up, in the well, own to the bot,-

a plug 14 can be driven tom of the pipe 2, past the perforations to close the opening at the bottom of the pipe 2 and thus make it necessary for the well water to enter the pipe 2 only through the perforations.

As many pipes 5 and 11 may be used as l found desirable, in practice, andthe lteringl material 1n the several compartments may be graduated as to coarseness, 5, if found desirable.

By providing a structure as shown and see Fig.

described, the strainer is adapted for use in almost any kind of well and is. particu- 'larly adapted for high pressure well service, as it 1s so constructe that it can be as- .sembled before lowering the same into a well that has already been dug, or it can be let down into the well' by the jet process, since its structure is such that water can be forced down through thepipe 2 to wash Aout the mud and sediment in advance of the strainer, as it is being loweredinto the well.

From the foregoing description taken in connection with the drawin s, it is thought that the complete constructlon, the manner of operation and the advantages of the invention will be clear to those skilled in the art to which it appertains.

What I claim is: p

1. A strainer comprising a plurality of perforated pipes' disposed one Within anof the perforations, the outer pipe being extended above the perforated zone to. form a reservoir for a reserve supply of filterin substance, said filtering substance adapted to gravitate down into the perforated zone of the pipes upon settling' of the filtering substance at the perforated zone of the pipes. i

3. A well strainer comprising an inner pipe, said pipe being perforated throughout a predetermined portion -of its length, an

outer pipe surrounding the inner pipe and perforated throughout a corresponding portion of its len h, means closing the space between said plpes at the bottom, a filtering substance pac ed in the y"space between the pipes throughout the erforated portion of their lengths and a su cient distance above the same, whereby to provide a reserve supply of lteri'ng substance that may settle down to replace worn or displaced material within the perforated zone of said pipes, the inner pipe being open ended and means for closing the lower end of the inner pipe while the same is in the operative locatlon in the 

